BMW i4 xDrive40 electric vehicle exterior

BMW i4 xDrive40 - Electric Vehicle Specs

Sedan AWD

Power

295 kW

(401 HP)

0-100 km/h

5.1 s

Top Speed

200 km/h

Battery Options

Standard Battery (83 kWh / 80 kWh)

Charging Curve & Charging Speed Analysis

Understanding Charging Performance

Charging performance isn't just about peak power—it's about sustained power across the entire charging curve. A vehicle that maintains 150kW from 10-80% SOC will charge faster than one that peaks at 250kW but quickly drops to 100kW after 20% SOC. The shape of the curve matters more than the highest peak power.

The key metric is C-rate, which accounts for both charging power and battery capacity. A C-rate of 2.0 means the battery can theoretically charge from 0-100% in 30 minutes, while 1.0 C-rate equals 60 minutes. This makes it easy to compare vehicles regardless of battery size.

Charging Curve Shape

Flat, sustained power across a wide SOC range beats high peaks that quickly taper off. Look for vehicles that maintain high power from 10-80% SOC.

C‑Rate & Timing

C-rate normalizes charging speed across different battery sizes. Higher C-rates mean shorter charging times and more flexible road trip planning.

Battery Options

Gross Capacity: 83 kWh
Net Capacity: 80 kWh
Buffer: 3%
The BMW i4 xDrive40 reaches peak charging power of 208 kW between 10–80% SOC.
It takes 29 min to charge from 10–80% SOC and adds 276 km of real-world highway driving range, representing a 1.5 C‑Rate. This performance is better than 34% in its class.

Average Charging Power

77 kW

Avg C‑rate: 1.0

Maximum Charging Power

208 kW

At 14 → 18% SOC

Minimum Charging Power

1 kW

0–100% Charging Time

1 h 7 min

Charging Curve

State of Charge over Time

SOC Range Charging Time Avg. Power Avg. C-Rate Energy Added
0% → 100% 1 h 7 min 77.4 kW 0.96 C 86.8 kWh
0% → 90% 42 min 111.5 kW 1.38 C 78.1 kWh
0% → 80% 32 min 126.4 kW 1.57 C 69.4 kWh
5% → 100% 1 h 5 min 75.6 kW 0.94 C 82.5 kWh
5% → 90% 40 min 110.1 kW 1.36 C 73.8 kWh
5% → 80% 31 min 125.5 kW 1.55 C 65.1 kWh
10% → 100% 1 h 4 min 73.1 kW 0.91 C 78.1 kWh
10% → 90% 38 min 107.2 kW 1.33 C 69.4 kWh
10% → 80% 29 min 122.3 kW 1.51 C 60.7 kWh